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M. H. DETRICK.

FURNACE ARCH. APPLICATION FILED FEB. 19, I916- SHEET 1 M. H. DETRICK.

FURNACE ARCH.

v n APPLICATION HLED FEB-191 1915- x n 1 g@@ %3& E'atented july 8, 1919.

3 SHEETSSHEET 2.

m 9 mafia? M. H. DETRICK.

FURNACE ARCH,

APPLlCATION FILED FEB. 19, 1916.

laiented Enly 8, 1919.

3 SHEETS-SHEET 3.

,magazines and adjuncts,

MYRON H. DETRICK,

@F CHICAGG, ELLEN 01S, ASSIGN'GR T0 MI. E. DETEICK C0., OF

CHICAGO, ILLINOIS, A CGRPORATION 0F ILLINOIS.

FURNACE-ARCH.

Specification of Letters Patent.

Patented July 8, lath.

Application filed February 19, 1916. $eria1 No. 79,295.

To all whom it may concern:

Be it known that I, MYRON. H. DETRIOK, a citizen of the United States, residing at the city of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Furnace-Arches, of which the following is a specification.

This invention relates to arches for boiler and other furnaces; having reference more especially to that class of furnaces, termed sidefeeddouble-inclined stokers, wherein fuel magazines are arranged at the respective sides of the fire chamber. Heretofore in furnaces of this class the arch has been supported on and sprung between the inner walls of the magazine, thus not only imposing the entire weight of the arch on the but necessitating the upward curvature of the arch in order to secure the requisite capacity of the fire chamber. In such construction the heat Was concentrated at the center ofthe arch instead of being uniformly distributed throughout the width of the chamber.

Moreover the intense heat caused the arch bricks to space 0d and fall.

The object of my invention is to provide for furnaces of the class mentioned a fiat arch of durable construction whereby the flame will be uniformly spread and distributed across the width of the fire chamber, and thus secure greater eliiciency and greater economy in the consumption of fuel.

Another object of my invention is to provide such an arch whereby an unobstructed space over the fuel magazines is provided.

A further object of my invention is to provide such an arch whereby any desiredcapacity of the fire chamber of the furnace proportional to the grate area can be obtained. 1

A still further object of my invention is to provide an arch structure wherein the arch bricks are supported by pendent members having capacity for free longitudinal movement in order to combine the elements of adjustability and flexibility.

A still further object of my invention is to provide an arch structure whereof the fire brick can be readily reached for removal and replacement. a

With these and other objects in view my invention comprises novel features of con struction and organizations of parts, all of 12, 13 are spaced from each other andfrom the beams which will be hereinafter-fully described and claimed.

The principles of my invention are illustrated in the drawings, in which Figure 1 represents a vertical cross section of a side feed furnace, taken on line '1-1 of Fig. 2; I

Fig. 2 is a longitudinal section taken on line .-22 of Fig. 1';

Fig. 3 is a partial plan of the furnace, the cover bricks being omitted and also the curtain wall supporting devices at the rear of the arch bars;

Figs. 4 and 5 are enlarged detail views of hanger construction;

Fig. 6 is a constructional detail of the framing;

Fig. 7 is a perspective view of a special device'for brick or tile suspension;

Fig. 8 is a similar view of a device for supporting the curtain Wall, and

Fig. 9 is a similar view of the end part of the arch bar for supporting said curtain wall device.

Further describing my -invention with reference to the drawings: 11 designate the grates of a side-feed double-inclined Stoker, and 22 mechanically operated stoker boxes, by which fuel is fed through.

the throats 3 of the magazines- 5-, the grates 1 and the clinker grinder 1'. A pair of E-beams 5-5 spaced from each other span the entire breadth of the stoker and their ends rest on the walls 66 at the rear part thereof. At each side of the furnace is an Ebeam 8, one end of which is supported by means of stirrup hung from the beams '5, and the other end is secured at 9 to the front framing of the stoker. In the present instance the stirrup comprises a pair of spaced bolts 7 bearing at their lower ends a strap 7 on which the beam 8 is supported beneath the beams 5, and having at their upper ends cross-bars 7" resting on the beams 5. A series of pairs of I-beams 11, supported by the beams 8 and are 5 as desired. The beams of each pair are also spaced apart and suspension hangers are interposed therebetween in spaced relation to each other. Each of these hangers comprises a body having a head 15 with projecting ends 16 resting on the lower and facing flanges of the paired beams, such body depending below the said beams and terminating in ears 17 which embrace the upper edge of the web 18 of the adjacent arch bar 19 and are flexibly connected thereto by a pivot pin. Each of the arch-bars is suspended at intervals throughout its length from the I-beams by means of a plurality of hangers, such bars thus being'at right angles to the beams as shown. The arch bars are provided with basal flanges 20 and the fire brick are provided in their upper portions with under cut grooves of corresponding cross-section to the flanged portions of the bars, whereby rows of such bricks can be readily applied to and supported by the re spective bars as shown.

By the construction just described the arch bricks are freely suspended in perfect balance from the beams, so that the pendent elements can swing to a limited extent or be shifted longitudinally of the beams in a manner to combine the advantages of adjustability and flexibility of parts.

The said arch bars may be extended from the front to the rear of the fire box, but for convenience of construction and in making replacements, I prefer to make each of said bars in two alining sections with their inner ends spaced apart from each other, and so to mount the bricks 26, 27 on the inner ends of the respective sections that each of said bricks will partly extend into the space 25 between the sections. (See Fig. 2). A closure device such as illustrated in Fig. 7 is employed to support a brick 31 within the space between the bricks 26, 27, said device comprising a vertical web 28, having basallateral flanges 29 which are received within the grooved top of the brick 31, and having also upper end extensions 30 which rest respectively on the tops of the bricks 26 and 27. By the construction just described it will be seen that access may be had to the arch for repair or other purposes, both toward the frontand rear of the furnace from the central opening thereto thus provided. Thus, for example, if it be desired to remove defective bricks from any of the arch bars, the closure device with its brick can be readily detached to open the space between the sections of said bars, and the bricks on the bar or bars can be successively shifted therefrom into the space and withdrawn therethrough, whereupon other bricks can be readily applied to the section or sections of the bars by way of the space. This done the space can be easily and securely closed. The closing device illustrated is a typical form which may bemodified without departure from my invention.

In order that the ends of, the arch bars at the rear of the furnace may be protected from the intense heat of combustion at that point, and further to protect the supporting framing and structure, it is necessary to build a curtain wall for that purpose. The

ends of the arch bars are protected by means of the end bricks or tiles 32 and 32, each of the bricks 32 being grooved only partially across its top, so that a portion of the brick projects rearwardly of and abuts against the end of the adjacent bar, and each of the bricks 32 being hung upon the rearwardly projecting portion, a, of a lever-like holder having a bearing portion, 5, which rests upon the adjacent brick 32,- and also a forward extension 0 which takes against the underside of the adjacent beam 5, as described and claimed in my pending application Serial No. 7 9,294, filed simultaneously herewith. A plurality of the lever-like holders with a row of bricks 32 supported thereon appear in Fig. 3.

The outer course of the bricks constituting the curtain wall is built upon the bricks 32 and the inner course thereof is built upon and supported independently of the arch bricks by means of brackets which are detachably mounted on the respective arch bars. Each of these brackets, as shown in Fig. 8, comprises a vertical web 33 and lugs 34 extended forwardly therefrom. At the upper part of the web is a horizontal plate 35. The rear end of the arch bar has transverse flanges 36 and 37 on each side of the web between which the lugs 34 are received, whereby the plate 35 is supported in rear of and above the arch bar. When the brackets are applied to the arch bars the curtain wall is built up upon the plates of the respective brackets and upon the outer row of bricks 32 to the desired height as above described, the outer course of curtain bricks thus serving to protect the brackets from the destructive action of the furnace heat. The covering of bricks 38 is then extended to inclose the supporting structures above the tops of the I-beams 5, 11, etc. Suspended from the longitudinal side beams 8 are hangers 39 from which depend below the underside of the arch bricks longitudinal bars 40 similar in construction to the arch bars, each of which bars 40 carries a row of fire bricks 41 in proximity to the throat of the adjacent fuel magazine of the stoker. Preferably the inner side wall of each magazine has secured thereto an inprojecting plate- 42 which affords a lateral support for the proximate row of fire bricks and at the same time provides an air duct adjacent the wall of the magazine. Upon each suspended row of bricks, inwardly of its suspension devices, is supporteda wall of firebrick 43 which is built up to any desired height in close rela tion to the sides of the arch brick, thereby effectually protecting the wallsof the fuel magazine from the intense heat generated in the tire. chamber.

The air duct between the plate 42 and the adjacent wall of .the magazine op into the furnace chamber, said plate bei g pro- 1,eoe,ess

the furnace with the open air; Air thus enters the space above the arch brick and flows through the communicating passages into the lateral ducts, and is thence discharged into the furnace chamber to facilitate the combustion of the fuel therein. The air maintains at a safe temperature the girders, arch-beams and other parts with which it contacts in its travel.

It is to be noted that by the construction above described not only is an unobstructed space over the fuel magazine provided but any desired capacity" of the fire chamber of the furnace proportional to the grate area can be obtained; that is to say, the arch can be supported at any desired elevation, within practical limits above the throats of the magazines, and the side walls comprising the bricks 41, 43, can be built up accordingly. In the form illustrated the brick walls adjacent the magazines are suspended or supported in large part from the metal work carrying the arch, and such metal work is borne by the masonry, thus relieving the fuel magazines of the weight of the arch v and its adjuncts.

The feature of dividing the body of the arch into three parts, whereof the central part is independently removable in order to facilitate the repairing of the adjacent parts of the arch is of great practical value, particularly in a structure wherein the arch is of great length.

While the arch construction herein shown and described to exemplify my invention has been particularly designed for use in con-- nection with side feed doubleinclined stokers, yet it is to be understood that vari ous features of the construction, as defined in the appended claims, may be embodied in other kinds of furnaces employing suspended arch bricks as contradistinguished from arches which are sprung between the side walls of the furnace.

In describing my invention l have done so by reference to E-beams as forming certain parts of the structure. @ther shapes, as channels or Ts may be used as desired, and in other respects the structure, forms and details may be varied without departing from the spirit of the invention.

1 claim 1. A furnace having a fire chamber, a plurality of inclined grates therefor, fuel magazines laterally of and in communication with said chamber, a substantially flat arch supported above the throats of the magazines, side walls extending above the throat portions of the magazines to the said arch, and

a supporting structure independent of the magazines, whereby said side walls are supported in proximity to the inner walls of the respective magazines.

2. A furnace having a fire chamber, a phi-- rality of inclined grates therefor, fuel magazines laterally of and in communication with said chamber, a substantially fiat arch above the throats of the magazines, said arch comprising metal supporting work and fire brick supported thereby, said supporting work being independent of the magazines, side walls of fire brick extending above the throat portions of the magazines to the said arch, and means wherebythe' said side walls are suspended from the said metal work in proximity to the inner walls of the respective magazines.

3. A furnace having a fire chamber, a plurality of inclined grates therefor, fuel magazines laterally of and in communication with said chamber, a substantially fiat arch above the throats of the magazines, said arch comprising metal supporting work and fire brick supported thereby, said supporting work being independent of the magazines, suspension devices from said metal work adj acent the inner sides of the respective magazines, basal rows of fire brick supported by the respective devices adjacent the throats of the magazines, and fire brick walls built on said basal rows and extending upwardly to the said arch.

4. A furnace having afire chamber, a pluralitysof inclined grates therefor, fuel magazines laterally of and in communication with said chamber, a substantially fiat arch above the throats ofthe magazines, a cover spaced above said arch, said arch comprising metal supporting work and fire brick suspended therefrom to provide an overlying air space, said supporting work being independent of the magazines, side walls extending above the throat portions of the'magazines to the said arch, and means whereby the said side walls are suspended from said supporting work in spaced relation to the inner walls of the respective magazines to afford air passages in communication with the space above the arch brick.

5. A furnace having a fire chamber, a plurality of inclined grates therefor, fuel magazines laterally of and in communication with said chamber, a substantially fiat arch above the throats of the magazines, a cover spaced above said arch, said arch comprising metal supporting work and fire brick suspended therefrom toprovide an overlying air space, said supporting work being independent of the magazines, side walls extending above the throat portions of the magazines to the said arch, means whereby the said side walls are suspended in spaced relation to the inner walls of the respective magazines to afiord air passages in communication with the &

space above the arch brick, and in-projecting plate members on said inner walls providing ducts in communication with the furnace chamber and the spaces between the said side walls and the magazines.

6. A furnace having a fire chamber, a plurality of inclined grates therefor, fuel magazines laterally of and in communication with said chamber, a longitudinal girder arranged on each side of the fire chamber adjacent a fuel magazine, pairs of transverse girders supported on said longitudinal girders, arch' bars supported by said transverse girders, fire brick dependent from said arch bars to form a substantially flat arch, side walls extending above the throat portion of the magazines to said fire brick, and means whereby each of the said side walls is suspended from the longitudinal girder adgacent thereto.

7. In a heating furnace, the combination with a side feed stoker having a plurality of inclined grates and inclosing walls forming a fire box, of a girder carried transversely across the rear portion of the stoker and supported by the side walls, a longitudinal girder on each side of the fire box having one end secured to the first named girder and having the other end secured to the front wall of the stoker, a plurality of transverse girders supported on said longitudinal girders, arch bars dependent from the transverse girders, and a plurality of fire bricks supported from said arch bars to form a fiat arch above said fire box.

8. In a heating furnace, the combination with a side feed stoker having a plurality of inclined grates and the inclosing walls thereof forming a fire box, of a girder carried transversely across the rear portion of the stoker and supported by the side walls, a longitudinal girder on each side of the fire box having one end supported by stirrups suspended from the first named girder and having the other end secured to the front wall of the stoker, a plurality of transverse girders supported on said longitudinal girders, arch bars dependent from the transverse girders, and a plurality of fire bricks supported from said arch bars to form a fiat arch above said fire box.

9. In a heating furnace, the combination with a side feed stoker having a plurality of inclined grates and the inclosing walls thereof forming a fire box, of a plurality of girders placed transversely of the stoker at the rear part thereof and supported on the side walls, a plurality of longitudinal girders one on each side of the stoker suspended at their rear ends from the girders last named, and supported at their front ends by the front wall of said stoker, a plurality of pairs of transverse girders spaced from each other and seated on the said longitudinal girders, hangers dependent from the paired girders,

a plurality of arch bars suspended from said hangers, and a plurality of fire bricks supported by said hangers to form a flat arch above said fire box.

10. In a heating furnace, the combination with a side feed stoker having a plurality of inclined grates and the inclosing walls thereof forming a fire box, of a pair of girders having inwardly facing flanges placed transversely of the stoker at the rear part thereof and supported on the side walls, a plurality of longitudinal girders one on each side of the stoker suspended at their rear ends from the girders last named, and supported at their front ends by the front wall of said stoker, a plurality of pairs of transverse girders having inwardly facing flanges spaced from each other and seated on the said longitudinal girders, T-shaped hangers dependent from the flanges of the paired girders, a plurality of arch bars suspended from said hangers, and a plurality of fire bricks supported by said hangers to form a fiat arch above said fire box.

11. In a furnace arch, the combination of a plurality of paired beams whereof each pair includes vertical webs and inwardly facing basal flanges spaced from each other, a series of hangers having T-heads seated on the respective inwardly projecting flanges of each pair of beams and depending below the latter, a series of arch bars positioned below and transversely of said beams, each bar being pivotally connected to the depending portions of the hangers adjacent thereto, and fire-bricks supported by said arch bars.

12. A furnace having an arch comprising two series of longitudinally-disposed bricksuspending elements having their inner ends spaced apart to provide a space therebetween extending transversely of the furnace, means supporting said elements, fire bricks slidably mounted on said elements and removable therefrom in the space between the two series, and means detachably supporting a plurality of fire bricks in said space.

13. A furnace having an arch comprising two series of longitudinally-disposed bars having their inner ends spaced apart to pro- 1 vide a space therebetween extending transversely of the furnace, means supporting said bars, fire bricks slidably mounted on said bars and removable therefrom in the space between the two series, and detachable means whereby a plurality of fire bricks are suspended in said space.

14c. A furnace having a fiat arch comprising sectional arch bars alined with each other having their inner ends spaced apart, means for supporting said bars, fire bricks mounted on said bars and removable therefrom in the space between the'inner ends of the bars, and means for detachably supporting fire brick in said space.

15. A furnace having a plurality of arch bars alined with and spaced from each other, means for supporting said bars, fire bricks mounted on the said bars and projecting partly into the space between the ends of the bars, and a device removably supported on the projecting portions of the fire bricks having means to support fire-brick in the space between said projecting portions.

16. in a fiat arch furnace, the combination of a plurality of arch bars alined with and spaced from each other, means for supporting said bars, fire bricks mounted on the adjacent ends of said arch bars with a space therebetween, a device comprising a vertical Web, fire-brick supporting flanges extended laterally from the lower part of said Web, and extensions from the upper part of said Web resting upon the said adjacent fire bricks.

17. In a flat arch furnace the combination of a plurality of arch bars alined With and Spaced from each other, means for supporting said bars, fire bricks mounted on the adjacent ends of said arch bars with a space therebetween, a device comprising a body portion, fire-brick supporting flanges extended laterally from the lower part of said body portion and extensions from the upper part of said body portion resting upon the said fire bricks on the ends of the arch bars.

18. In a furnace, the combination with a plurality of arch bars extending from the front toward the rear of the furnace, arch bricks On said bars, and a. curtain Wall comprising inner and outer courses of bricks at the rear of the arch bars, of brackets supporting the inner course of curtain bricks independently of the arch bricks, and means detachably securing said brackets to the rear extremities of the respective arch bars, each of said brackets including a rearwardly projecting portion having a horizontal bricksupporting plate thereon above the arch bars, said brackets being protected by the outer course of bricks of the curtain Wall.

In Witness whereof I have hereunto subscribed my name this 15th day of February, 1916, in the presence of two subscribing- Witnesses.

MYRON H. DETRICK.

lVitnesses C. K. CHAMBERLAIN, A. S. PHILLIPS. 

